Mortenax Blade
★★★★★

Mortenax Blade Build

Mortenax Blade is a 5★ Fire character on the Path of Nihility in Honkai: Star Rail. Below are the character's stats, skills and Eidolons — plus a pity calculator if you plan to pull.

Released: 01/06/2026 · v4.2· Updated: 03/07/2026
Updated for version 4.3 · 02/07/2026
Calculate pity to pull this character →
Community usage · phase 4.3.2
Memory of Chaos11.4%
Pure Fiction36.4%
Apocalyptic Shadow29.8%
Stats from 16,423 real player profiles (Memory of Chaos) · community data by LvlUrArti
Building Mortenax Blade — just follow the numbers
30-second summary

Mortenax Blade is a hybrid between a 'reckless brawler' and a 'living shield': he burns his own HP to unleash massive AoE Fire damage across all enemies while also taunting them (forcing enemies to attack him instead of teammates) and cutting his own damage taken to protect the team.

1
30-second build
In a hurry? This box is all you need — details below
BodyCRIT DMG% (đổi sang CRIT Rate% nếu tỷ lệ bạo kích chưa đạt khoảng 70-80%) FeetHP% SphereFire DMG Boost% (Tăng sát thương Hỏa) RopeEnergy Regeneration Rate% (đổi sang HP% nếu năng lượng đã đủ dùng)

Sub-stat priority: CRIT Rate > CRIT DMG > HP% > SPD > Effect RES

2
Verdict & playstyle
How strong, worth pulling, how to play
Memory of Chaos 5/5
Pure Fiction 5/5
Apocalyptic Shadow 5/5
Should you pull Mortenax Blade?

Mortenax Blade is a hybrid between a 'reckless brawler' and a 'living shield': he burns his own HP to unleash massive AoE Fire damage across all enemies while also taunting them (forcing enemies to attack him instead of teammates) and cutting his own damage taken to protect the team.

Since he is brand new, this is an early assessment - a cautious 4/5: high potential but still needs more real-world verification.

Pros
  • Massive AoE damage (hits all enemies at once) that scales off Max HP, so you don't need to sink resources into an expensive ATK stat.
  • Self-taunts enemies and cuts 90% of damage he takes on entering combat - he tanks hits for the team while dealing damage, great for players worried about a 'fragile' team wipe.
  • His Ultimate weakens all enemies at once (lower DEF, higher DMG taken), so the whole team benefits from bigger numbers, not just him.
  • Has a built-in auto-loop: attack enough and he automatically unleashes a 420% Max HP AoE finisher, no complicated combo timing needed.
Cons
  • He constantly 'burns' his own HP to deal damage (losing 10-20% Max HP each time he uses his Skill or Ultimate) - without a solid healer, he can easily put himself in danger mid-fight.
  • He just released, so the community hasn't fully verified optimal numbers and team comps yet - everything here is an 'early assessment' and may change as more real data comes in.
  • There's no reliable Eidolon (character rank-up) data yet to recommend investing further copies right now - hold off on spending extra resources on his Eidolons for the time being.
  • His enhanced Basic ATK hits a single target while his enhanced Ultimate hits everyone - the alternating single-target vs AoE hits can be confusing for newer players tracking turn order.
How to play

Open with the Skill 'A Rain of Blades Seals Fate': it consumes 10% of his own Max HP and deals damage equal to 90% Max HP to all enemies, plus 4 extra instances each dealing 30% Max HP to a random enemy.

Once Energy is full, use the Ultimate 'Fornax Ex Corpore' to inflict 'Balefire Bind' on all enemies (reduces their DEF by 35% and increases DMG they take by 60% for 2 turns), then it consumes another 20% Max HP to deploy a Zone and enter an Enhanced State.

While enhanced, his Basic ATK becomes 'A Tempered Blade Severs Souls' (140% Max HP to one target plus Taunt).

Every ally attack landed on an enemy while the Zone is active grants 1 Charge via the Talent 'All Karma Comes Due'; once Charge hits 9 (with HP above 1), it auto-restores 30 Energy and unleashes the enhanced Ultimate 'Tenax Per Ignem' - a 420% Max HP nuke hitting all enemies, which is his main finishing move.

3
Full build
Light cones, relics, stat targets — with reasons
Best Relics
BodyCRIT DMG% (đổi sang CRIT Rate% nếu tỷ lệ bạo kích chưa đạt khoảng 70-80%)
FeetHP%
SphereFire DMG Boost% (Tăng sát thương Hỏa)
RopeEnergy Regeneration Rate% (đổi sang HP% nếu năng lượng đã đủ dùng)

Sub-stat priority: CRIT Rate > CRIT DMG > HP% > SPD > Effect RES

Stat targets

Because Mortenax Blade's damage scales off his own Max HP percentage instead of the usual ATK stat, stack HP% on the Feet and prioritize Fire DMG Boost on the Sphere. Use CRIT DMG% on the Body to hit harder on crits.

For the Rope, pick Energy Regeneration if his Ultimate feels slow to charge, or switch to HP% once Energy is comfortable. Substat priority: CRIT Rate > CRIT DMG > HP% > SPD > Effect RES (so he isn't easily crowd-controlled while tanking hits for the team).

4
Teams
Best teammates to pair with
Best teams for Mortenax Blade

Team 1 (premium, high investment): Mortenax Blade + Robin (team-wide ATK/CRIT buffs) + Ruan Mei (general DMG boost and enemy weaken) + Huohuo (healing plus SPD buff).

Team 2 (budget-friendly, easy to build): Mortenax Blade + Tingyun (ATK buff and Energy support) + Gallagher (shield plus healing) + Lynx (healing and emergency rescue) - great for newer players since Mortenax burns a lot of his own HP and needs steady healing.

Team 3 (debuff-stacking, weakens enemies): Mortenax Blade + Pela (DEF shred) + Jiaoqiu (extra Fire DMG amplification) + Bailu (healing).

All three teams need at least one dedicated healer, since Mortenax Blade constantly burns his own HP.

Meta suggestions synthesized from global community consensus (Meta 2026-07 (early)). Figures come from game data — updated each patch.

5
Eidolons
How far to invest, which milestones matter

Nhân vật vừa ra mắt, chưa có dữ liệu Bí Ảnh (eidolon) nào được cộng đồng kiểm chứng đầy đủ - cứ chơi E0 (không lên bí ảnh) trước, đợi vài tuần cho ổn định số liệu rồi hẵng cân nhắc đầu tư thêm. — Too new — community data is not settled enough for an Eidolon call. E0 is fine; do not rush copies before the meta stabilizes.

E1
Ere My Death, I Stood Unmade★★★★★
While the Zone is active, decreases all enemies' All-Type RES by 20%. After using the extra Skill from Talent, the "Infinite Fury" countdown has its action delayed by 15%.
While the Zone is active it cuts all enemies' All-Type RES by 20%, a strong team-wide RES shred that significantly boosts everyone's damage.
E2
Ash Was My Heart, Yet the Flame Stayed★★★★☆
When an ally character uses Ultimate to deal DMG, it is considered as having launched Follow-Up ATK. And the Follow-Up ATK DMG dealt by ally targets increases by 75%. The upper limit of Mortenax Blade's Charge decreases to 7.
Makes ally Ultimates count as Follow-Up ATKs and boosts Follow-Up DMG by 75%, unlocking major synergy with follow-up-scaling gear and kits.
E3
Across the Shore, Wrath Laid Bare★★☆☆☆
Ultimate Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Only levels up Ultimate and Talent by +2 (max Lv.15), a minor stat bump rather than a real power spike.
E4
Odium I've Smitten, Thence Came the Blade★★★★☆
"Heart, Refined ad Infinitum" additionally increases ally targets' DMG dealt by 50%.
"Heart, Refined ad Infinitum" additionally increases ally DMG dealt by 50%, a substantial team-wide damage boost.
E5
I Severed My Woes, Knowing Death Begets Life★★☆☆☆
Skill Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
Only levels up Skill (+2) and Basic ATK (+1), a minor stat bump rather than a real power spike.
E6
If Immortality Could Die, I Swore THEM Slain★★★★★
As the Zone persists, when Mortenax Blade takes DMG or consumes HP, he gains 1 Charge. This effect can trigger again after any target's turn ends. The DMG multiplier of "Tenax Per Ignem" increases to 150% of its original value.
While the Zone persists, gains Charge from taking DMG or consuming HP, and the DMG multiplier of Ultimate "Tenax Per Ignem" increases to 150% of its original value, a massive E6 damage spike.
6
Skills & Traces
What to level first — tap each skill for details
Skill Leveling Priority
Ultimate ★★★★★ Ultimate both applies the team-wide "Balefire Bind" debuff (DEF down, DMG taken up) and serves as the massive AoE nuke Tenax Per Ignem scaling off Max HP, so it should be maxed first.
Talent ★★★★★ Talent sustains the Zone, reapplies Balefire Bind after every ally attack, and builds Charge to trigger extra Ultimate casts, making it just as important as Ultimate.
Skill ★★★☆☆ Skill deals HP%-scaling AoE DMG but costs the character's own HP, contributing extra output rather than being the core power source, so it sits at medium priority.
Basic ATK ★☆☆☆☆ Basic ATK only hits a single target and applies Taunt, unrelated to the core debuff/Zone loop, so it remains the lowest leveling priority.
Trace priority: A6 > A4 > A2 Eidolon priority: E6 = E4 > E1 = E2 > E3 = E5
Skills
A Broken Blade Still Slays
A Broken Blade Still Slays
Basic ATK Single Target Lv.10

Deals Fire DMG equal to 70% of Mortenax Blade's Max HP to one designated enemy, and causes the target to enter the Taunt state for 1 turn.

A Rain of Blades Seals Fate
A Rain of Blades Seals Fate
Skill AoE Lv.15

Consumes HP equal to 10% of Mortenax Blade's Max HP and deals Fire DMG equal to 90% of Mortenax Blade's Max HP to all enemies, and additionally deals 4 instance(s) of DMG, with each instance dealing Fire DMG equal to 30% of Mortenax Blade's Max HP to one random enemy. If the current HP is insufficient, Mortenax Blade's current HP will be reduced to 1 when he uses Skill. While not in the "Infinite Fury" state or when the current HP is 1 or lower, Mortenax Blade cannot use his Skill. Using Skill does not consume Skill Points.

Fornax Ex Corpore
Fornax Ex Corpore
Ultimate Enhance Lv.15

Inflicts "Balefire Bind" on all enemies. Enemy targets in the "Balefire Bind" state have their DEF reduced by 35% and the DMG they receive increases by 60%, lasting for 2 turn(s). Then, consumes HP equal to 20% of Mortenax Blade's Max HP to deploy a Zone. While the Zone is active, Mortenax Blade enters the "Infinite Fury" state. During the "Infinite Fury" state, increases CRIT Rate by 20%, increases CRIT DMG by 75%, enhances Basic ATK, unlocks Skill, and gains a new Ultimate "Tenax Per Ignem." When receiving a killing blow, this unit will not be knocked down, but will dispel the Zone, exit the "Infinite Fury" state, and restore HP equal to 50% of this unit's Max HP. When gaining the "Infinite Fury" state, a corresponding countdown appears on the Action Order. The countdown has a fixed SPD of 70. At the start of the countdown's turn, dispels the Zone and exits the "Infinite Fury" state. If the current HP is insufficient, Mortenax Blade's current HP will be reduced to 1 when he uses this ability.

All Karma Comes Due
All Karma Comes Due
Talent Support Lv.15

While the Zone is active, after each attack an ally target uses on an enemy, inflicts the "Balefire Bind" state on the corresponding enemy target and grants 1 Charge to Mortenax Blade. When Charge reaches 9 points and the current HP is more than 1, consumes 9 Charge, regenerates 30 Energy, and enables Mortenax Blade to use Skill 1 extra time. This extra Skill use is considered as Follow-Up ATK.

One Cut Ends All
One Cut Ends All

Attacks an enemy, and after entering combat, reduces their Toughness of the corresponding Type.

Blade's Reach Spares None
Blade's Reach Spares None
Technique

Immediately attacks all enemies within a certain range. After entering combat, inflicts the Taunt state on all enemies for 1 turn and decreases DMG taken by this unit by 90% for 2 turn(s).

A Tempered Blade Severs Souls
A Tempered Blade Severs Souls
Basic ATK Single Target Lv.10

Deals Fire DMG equal to 140% of Mortenax Blade's Max HP to one designated enemy, and causes the target to enter the Taunt state for 1 turn.

Tenax Per Ignem
Tenax Per Ignem
Ultimate AoE Lv.15

Deals Fire DMG equal to 420% of Mortenax Blade's Max HP to all enemies.

Major Traces
3 powerful passives (A2/A4/A6) — unlocked via Ascension
A2
Bone, Hardened ad Nauseam

Mortenax Blade can accumulate up to 80 overflow Energy. After using Ultimate, clears it and regenerates a corresponding amount of Energy. When the battle starts or when the Zone is dispelled, if Energy is below 75%, it is immediately regenerated to 75%. When Energy is regenerated to its maximum, dispels all debuffs from this unit.

A4
Soul, Tempered ad Mortem

While the Zone is active, increases the chance of being attacked by enemies, decreases DMG taken by this unit by 50%, and increases Incoming Healing by 50%. After being attacked, inflicts the "Balefire Bind" state on the corresponding target, and enables Mortenax Blade to gain 1 Charge.

A6
Heart, Refined ad Infinitum

While the Zone is active, ally targets deal 50% increased DMG. If there are other Nihility characters aside from Mortenax Blade in the team, Ultimate DMG dealt by ally targets increases by 75%. Otherwise, DMG dealt by Mortenax Blade additionally increases by 75%.

Trace Bonuses
Total stats gained from unlocking the full trace tree
+22.4%Fire DMG Boost
+12%CRIT Rate
+10%HP
7
Stats & Materials
Base stats at Lv.80 and what to farm
Level 80 stats
HP
1,358
ATK
543
DEF
485
SPD
107
CRIT Rate
5%
CRIT DMG
50%
Ascension Materials
Total materials to max ascension — tap to see how to farm.
Material Planner →
8
Mortenax Blade FAQ
What is the best Light Cone for Mortenax Blade?

The best Light Cone for Mortenax Blade is In the Name of the World (top pick). See F2P options in the Light Cones section above.

Is Mortenax Blade worth pulling?

Mortenax Blade is a hybrid between a 'reckless brawler' and a 'living shield': he burns his own HP to unleash massive AoE Fire damage across all enemies while also taunting them (forcing enemies to attack him instead of teammates) and cutting his own damage taken to protect the team. Since he is brand new, this is an early assessment - a cautious 4/5: high potential but still needs more real-world verification.

What is the best team for Mortenax Blade?

Team 1 (premium, high investment): Mortenax Blade + Robin (team-wide ATK/CRIT buffs) + Ruan Mei (general DMG boost and enemy weaken) + Huohuo (healing plus SPD buff). Team 2 (budget-friendly, easy to build): Mortenax Blade + Tingyun (ATK buff and Energy support) + Gallagher (shield plus healing) + Lynx (healing and emergency rescue) - great for newer players since Mortenax burns a lot of his own HP and needs steady healing. Team 3 (debuff-stacking, weakens enemies): Mortenax Blade + Pela (DEF shred) + Jiaoqiu (extra Fire DMG amplification) + Bailu (healing). All three teams need at least one dedicated healer, since Mortenax Blade constantly burns his own HP.

Matching Light Cones
Path of Nihility — a Light Cone only gives its bonus to matching-Path characters.
Light Cones →
How to read this build page

Every character build page has these parts: recommended Light Cone/Relic sets and stat table, a Trace/skill leveling order, Eidolon milestones worth considering, and a reference SPD threshold. Read them in that order — gear tells you "what to use", Traces tell you "what to level first", Eidolon tells you "is it worth pulling dupes", SPD tells you "how fast you need to be to keep the rotation on time". The section below explains how to read each part and applies the same way to every character on the site — check the exact numbers in the table above this section, since community sources sometimes differ by a few points.

Why the Light Cone and Relic picks make sense

Most characters have a "signature" Light Cone built for their exact role, plus a few cheaper substitutes from the standard banner or easy-to-get 3-4★ cones. Missing the signature isn't a dead end — most characters keep most of their power with a well-matched substitute, typically losing somewhere between a few percent and roughly a fifth of total damage depending on the setup, per most public comparisons.

  • Relic sets (2pc+2pc or 4pc) are picked for the set effect that fits that character's role (single-target DPS, AoE, shield/healing support, Break damage, and so on).
  • Main stats per slot (Body/Feet/Sphere/Rope) and substats follow a priority that changes by role: DPS roles usually chase CRIT Rate/CRIT DMG before ATK%; Break-focused roles prioritize Break Effect; support/healing roles often value Effect Hit/RES or Outgoing Healing over pure CRIT.

These weights differ per character and can shift slightly between ranking sources — follow the exact priority table above rather than applying one formula to every role.

Trace/skill leveling order by role (a general guideline, not a fixed rule)

There's no single order that's correct for every character, and community sources sometimes disagree depending on the team the character is used in — but the general pattern by role is:

  • DPS: level whichever skill (Skill or Ultimate) carries most of the damage for that character first, with Basic ATK usually last if it isn't the main damage source.
  • Support/Buffer: prioritize Traces that boost buff strength or the skill that applies the effect over Basic ATK, since this role's value comes from lifting the team rather than personal damage.
  • Healer/Shielder: prioritize the main healing or shield skill first, since that is the reason the team runs this character.
  • Break/CC: prioritize whichever skill contributes the most Toughness Damage, since the Break/Weakness Break window is where the team dumps damage.

Major Traces unlock at fixed ascension levels in-game, not by choice — but which one to level first (when resources are limited) should follow the role priority above. Since the exact order can differ between ranking sources, check the specific recommendation in the table above for this character.

Eidolons: how far E0 gets you, and which milestone is worth considering

General rule: most characters at E0 (no duplicates) already handle most content, even 5-star characters. Eidolons are a duplicate-fueled upgrade system — higher levels cost more resources for a smaller power gain, and the actual gain varies a lot per character (some barely change role at E0, others shift how they're played at a specific level). The milestones most often cited by the community tend to sit at E1, E2, or E6 depending on the character — but none of these are required to clear the game's content. Check the Eidolon section in the table above for this character's specific milestone and gain; if sources disagree on how to rate a milestone, trust the in-game effect description over a pre-set percentage number.

How to think about SPD breakpoints

SPD (Speed) controls how often a character acts in the turn order — higher SPD means denser actions, and for some roles (especially support/healing that need to buff or heal before the team gets hit) hitting the right SPD "breakpoint" matters more than the raw SPD number. Values like 101 or 134 SPD are often cited as community-common breakpoints (letting a character act again before or after a specific point in certain team setups) — this is crowd-verified action-gauge math, not an official fixed number the game states for every situation. The right breakpoint also depends on the team and allies' SPD, so treat the SPD suggestion in the table above as a starting point to adjust from, not a mandatory target.

Where to dig deeper

This section only teaches you how to read the page — for deeper comparisons, use the dedicated tools:

  • Tier list to see where this character stands against the full roster.
  • Teams for full in-game comps with rotation order.
  • Relic score to check how your current gear scores against the benchmark.
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